It is almost impossible for invading force to win a ground war unless it is a back water country like Granada.
1. Invading troops would ask them self why they are there, and are they mercenaries or army of peace?
2. Friends & foes all look the same, therefore it is hard to differentiates between them.
3. Invading troops are foreigners and isn't someone that the local can relates to.
And, as said in my previous post China is not going to stand by and let a western power set up camp in their back yard.